CVE-2022-49948: vt: Clear selection before changing the font
Vulnerability summary
CVE-2022-49948 is a high (CVSS 7.8) Out-of-bounds Read vulnerability in linux. EPSS estimates a 0.27% chance of exploitation in the next 30 days, higher than 19.8% of scored vulnerabilities.
Not severe (CVSS 7.8, local access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 7 · Related 7Timeline
- 18-06-2025PublishedVulnerability first disclosed.
- 15-10-2026Last modifiedVulnerability information updated.
Description
In the Linux kernel, the following vulnerability has been resolved: vt: Clear selection before changing the font When changing the console font with ioctl(KDFONTOP) the new font size can be bigger than the previous font. A previous selection may thus now be outside of the new screen size and thus trigger out-of-bounds accesses to graphics memory if the selection is removed in vc_do_resize(). Prevent such out-of-memory accesses by dropping the selection before the various con_font_set() console handlers are called.
CVSS metrics
5 scores · 4 sources · 2 versions- OSV · UbuntuEcosystem advisory · calculated7.8HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- OSV · DebianEcosystem advisory · calculated7.1HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:HDiffers
- NVDNIST7.1HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:HDiffers
EPSS trend
Probability
0.27%
Chance of exploitation in the next 30 days
Percentile
20%
Versus all other CVEs
30-day change
Increase +0.01 pp
From 0.27% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.
Ubuntu111 products
- linuxAll versions (No fix recorded) | < 4.15.0-201.212 | < 5.4.0-136.153 | < 5.15.0-57.63
- linux-allwinner-5.19All versions (No fix recorded)
- linux-awsAll versions (No fix recorded) | < 4.15.0-1147.159 | < 5.4.0-1093.101 | < 5.15.0-1027.31
- linux-aws-5.0All versions (No fix recorded)
- linux-aws-5.11All versions (No fix recorded)
Linux2 products
- linux≥ 009e39ae44f4191188aeb6dfbf661b771dbbe515, < c555cf04684fde39b5b0dd9fd80730030ee10c4a | ≥ 009e39ae44f4191188aeb6dfbf661b771dbbe515, < e9ba4611ddf676194385506222cce7b0844e708e | ≥ 009e39ae44f4191188aeb6dfbf661b771dbbe515, < f74b4a41c5d7c9522469917e3072e55d435efd9e | ≥ 009e39ae44f4191188aeb6dfbf661b771dbbe515, < 1cf1930369c9dc428d827b60260c53271bff3285 | ≥ 009e39ae44f4191188aeb6dfbf661b771dbbe515, < 989201bb8c00b222235aff04e6200230d29dc7bb | ≥ 009e39ae44f4191188aeb6dfbf661b771dbbe515, < 2535431ae967ad17585513649625fea7db28d4db | ≥ 009e39ae44f4191188aeb6dfbf661b771dbbe515, < c904fe03c4bd1f356a58797d39e2a5d0ca15cefc | ≥ 009e39ae44f4191188aeb6dfbf661b771dbbe515, < 566f9c9f89337792070b5a6062dff448b3e7977f | e60f8fcce05042e8f8cea25ee81fecc1222114cf | 5812a9bc9d68a82c2cc839f88e6f7a05093ab39d | 863ad19fd654c485e3beec3575c4d74a1e74369e | dbc3fd44f957a39407e889287bf61fa0ef3ecc14 | 0b2a0a58ad22f9d6dfc641bc5ec46057493f22a5 | 9f2d48f0745f921040df91bfe8fa7f0339cd7497 | 3425e397fb23cc2e8e6fb8f5b8226dcb447e84dd | eeae0a12a16650ff494d5faefa371cd9e7079575 | ≥ 3.2.85, < 3.3 | ≥ 3.10.105, < 3.11 | ≥ 3.12.68, < 3.13 | ≥ 3.16.40, < 3.17 | ≥ 3.18.45, < 3.19 | ≥ 4.1.36, < 4.2 | ≥ 4.4.31, < 4.5 | ≥ 4.8.7, < 4.9 | 4.9
- linux_kernel< 4.9.328 | ≥ 4.10, < 4.14.293 | ≥ 4.15, < 4.19.258 | ≥ 4.20, < 5.4.213 | ≥ 5.5, < 5.10.142 | ≥ 5.11, < 5.15.66 | ≥ 5.16, < 5.19.8 | 6.0:rc1 | 6.0:rc2 | 6.0:rc3
Debian1 product
- linux< 6.0.2-1
3 vendors · 114 products
